US 349642 A
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(NeModel.) v v v S. F. GIBSON 8v F. M. LAWRENCE.
STOVE DOOR KNOB.
No. 349,642. Patented Sept. 21, 1886.
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UNITED STATES PATENT OFFICE.
SELDEN F.l GIBSON AND FRANKLIN IVI. LAWRENCE, OF PORTLAND, MAINE; SAID LAWRENCE ASSIGNOR OF HIS RIGHT TO VILLIAM H. STEVENS, OF
SPECIFICATION forming-part of Letters Patent No. 349,642, dated September 2l, 1886.
Application filed February 17, 1886. Serial No. 192,247. (No model.)
To all whom it may concern.'
Be it known that we, SELDEN F. GIBSON and FRANKLIN M. LAWRENCE, both of Portland, in the county of Cumberland and State 5 of Maine, and citizens ofthe United States,
have invented an Improvement inStove-Door- Knobs, of which the following description is sufficient to enable those skilled in the art t-o which it, appertains to construct the same, ref- Io erence being had to the drawings, herewith made a part of this specification.
Our invention relates to that class of stoveknobs intended to be non-conductors of heat, so constructed that the samewill remain suffi- I 5 ciently cool to behandled with the naked hand, even when the body of the stove is very hot; and it-consists, more particularly, of a Wooden knob with a metal disk-base, having a metal boss or washer upon one side and a counter- 2o sunk space on the other, with a non-conducting washer, wooden knob, and screw, all as will now be more fully set forth and explained.
The following is a description of our invention sufficient to enable those skilled in the art to construct the saine, reference being had to the drawings, making a part hereof.
OurinIproved knob consists of a metal diskbase of greater diameter than the shank of the wooden knobherei nafter mentioned; but which 3o base may be flat or of such general shape as desired, but having upon the l side to which said Wooden knob is iiXed a circular space countersunk about one-'sixteenth of an inch, corresponding in size to the diameter of the 35 shank of said wooden knob, which countersunk space is filled by an asbestus washer or a washer of any other indestructible non-conductor of heat. We do not confine ourselves to the Ause of a countersunk space in the base, for it may be located in the shank of the wooden knob, or the Washer may be used without any countersunk space. Upon the opposite side of the base, if desired, a boss or washer may be added. kA wooden knob of suitable size, its shank resting against 'the non conducting Washer, is attached tothe base by means of a screw passing through the center of thedevice, which screw also serves to attach the device to the stove. The base, when polished or plated, is ornamental, and serves in some degree to shield the knob from the radiated heat, while the asbestus or nonconducting washer and the material of the knob so prevent the absorption of heat that the knob is at all times cool enough to handle with the naked hand.
In the drawings, Figure 1 shows a transverse section of the complete knob; Fig. 2, a perspective view; Fig. 3,. the face of the diskbase with the countersunk space.
A is the knob; B, the space for the insertion of the non conducting washer; O, the disk-base; D, the washer; E, the screw.
We claim'- The combination'of a wooden knob with a metal disk-base having ametal boss or washer upon one side and a countersunk space on the other, with a non-conducting washer, wooden knob, and screw, substantially as described and set forth.
SELDEN F. GIBSON. FRANKLIN M. LAVVRENOE. Attest:
WILIsUR F. LUNT, WILLIAM H. STEVENS.